Patent Application
20180281059
The present invention relates generally to a structure of a die-casting machine, and more particularly to a full-servo multi-axis die-casting machine that uses servomotors as primary power sources.
Die casting is a process of casting that is achieved by filling metals having good property of melting and solidifying, such as aluminum, zinc, magnesium, and copper, through fast high pressure mechanical property, into a temperature-resistant metal mold and making use of a relatively low temperature of the steel mold to achieve fast cooling and solidification for shape fixing.
A regular hot-chamber die-casting machine generally comprises a base on which a mold is provided. The mold is provided, at one side thereof, with an injection port. A melting furnace is provided beside the base and a hydraulic cylinder is arranged above the melting furnace. The hydraulic cylinder is provided, on an end thereof, with an injection head that mates and is connectable with the injection port of the mold in order to allow fast high pressure mechanical property to be filled into the temperature-resistant metal mold. The conventional die-casting machine suffers certain drawbacks. For example, a pneumatic cylinder or a hydraulic cylinder is used as a power source and a moving stroke or speed cannot be controlled accurately. Calibration and tuning must be conducted based on experience. Further, the hydraulic cylinder often makes the working environment oily. Improvements are necessary for the conventional die-casting machine.
Thus, the technical issue that the present invention is made for is to overcome the above-discussed shortcomings.
In view of the above-discussed shortcomings, the present invention provides a full-servo multi-axis die-casting machine, which comprises: an injection device body, a gooseneck operation device body, and a plurality of mold locking device bodies. The injection device body comprises a hollow first frame, a first servomotor, a screw, a transmission unit and an injection unit, so that when the first servomotor is in operation, the screw is rotated and the transmission unit converts the rotation of the screw into vertical reciprocal movement. The gooseneck operation device body comprises a second servomotor, a first transmission arm, and a second transmission arm, so that when the second servomotor is in operation, the first transmission arm and the second transmission arm are driven to cause the transmission section to rotate such that the bifurcation sections are driven to oscillate frontwards and rearwards with the rotation of the transmission section. Each of the mold locking device bodies comprises a third servomotor, a third transmission arm, and a mold retention slide block, so that when the third servomotor is in operation, the third transmission arm is rotated and the third transmission arm drives the mold retention slide block to move such that the mold retention slide block is cause to reciprocate in the channel.
The purpose of the full-servo multi-axis die-casting machine according to the present invention is to replace a pneumatic cylinder or a hydraulic cylinder with a servomotor so that operation strokes are made more accurate without the need for manual correction and also without noise generated by a pneumatic cylinder and oiliness caused by a hydraulic cylinder, and also operation safety is enhanced to thereby provide efficacy of environmental protection, energy saving and humanization.
Further, the mold locking device bodies allow a mold to be split into four axial direction, making mold opening easy and providing flexibility in selecting a parting line, metal melt being allowed to directly filled into the mold through the parting line, so that flow division structure used in the conventional die casting can be eliminated, cooling is made fast to thereby save energy, save material, and improve manufacturing speed.
The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
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The first servomotor 12 is mounted to a top of the first frame 11. The first servomotor 12 has an end coupled to a first speed reduction mechanism 121. The first speed reduction mechanism 121 is coupled to one end of the screw 13. An opposite end of the screw 13 is coupled to the transmission unit 14. An opposite end of the transmission unit 14 is coupled to the injection unit 15. The injection unit 15 comprises at least one inlet port 151 and at least one outlet port 152. The injection unit 15 has two sides that are each slidably mounted on a guide rail 153. The injection unit 15 is also provided, on each of two sides thereof, with a coupling section 154 projecting therefrom. The standing board 40 comprises a first through hole 41 formed therein and the outlet port 152 of the injection unit 15 is received through the first through hole 41.
The standing board 40 comprises a first opening 42 and a second opening 43 mounted to a side surface thereof. The standing board 40 is provided therein with a cooling water channel 44 arranged as a loop. The cooling water channel 44 has two ends respectively communicating with the first opening 42 and the second opening 43.
The first speed reduction mechanism 121 and the one end of the screw 13 are respectively provided with a first fixing element 122 and a second fixing element 131, such that the first fixing element 122 is coupled to the second fixing element 131.
The first frame 11 is also provided therein with a separation plate 111. The separation plate 111 is formed with a first through aperture (not shown). The screw 13 extends through the first through aperture. The screw 13 is provided, on the end thereof, with a third fixing element 132. The third fixing element 132 is coupled to the separation plate 111 and the third fixing element 132 is provided therein with a bearing 1321.
The injection unit 15 is provided with a second through aperture (not shown) to receive the extension of the screw 13 therethrough. The inlet port 151 and the outlet port 152 are respectively formed on a bottom surface and a side of the injection unit 15.
The first frame 11 is provided, in a side thereof, with a constraint hole 112. The transmission unit 14 is provided, on a side thereof, with an engagement section 141 projecting therefrom such that the engagement section 141 is received through the constraint hole 112.
Referring to
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An end of the second servomotor 21 to which the second speed reduction mechanism 211 is mounted is coupled to a second frame 212. The second frame 212 is provided, at one side thereof, with a seat plate 213. The second frame 212 is formed with a third through aperture 2121 and the seat plate 213 is provided with a first spindle seat 2131 and a second spindle seat 2132. The third through aperture 2121 and the first spindle seat 2131 receive the second speed reduction mechanism 211 to extend therethrough. The second speed reduction mechanism 211 is coupled to a first eccentric element 214. An end of the first eccentric element 214 that is coupled to the second speed reduction mechanism 211 is rotatably mounted to the first spindle seat 2131 and an opposite end of the first eccentric element 214 is received through the first spindle hole 221. The first eccentric element 214 is provided, on an end face of said opposite end, with an eccentric shaft 2141 extending therethrough. The eccentric shaft 2141 is rotatably mounted to the second spindle seat 2132.
The transmission section is further provided thereon with two spaced coupling elements 234. The bifurcation sections 233 are located between the coupling elements 234 such that a predetermined distance is present between the bifurcation sections 233.
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An end of the third servomotor 31 is provided with a third speed reduction mechanism 311. The third speed reduction mechanism 311 is rotatably coupled, in an eccentric manner, to the third transmission arm 32. An opposite end of the third transmission arm 32 is rotatably coupled to the mold retention slide block 33. One end face of the mold retention slide block 33 is mounted, in a slidable manner, in a mold seat 34. The mold seat 34 comprises at least two projection sections 341, 342 and a channel 35 is formed between the projection sections 341, 342. The one end of the mold retention slide block 33 is slidably mounted in the channel 35. The mold seat 34 is provided with a second through hole 345 that is in communication with the first through hole 41 and the outlet port 152 is received through the second through hole 345.
The mold seat 34 is located in an area circumferentially surrounded by the cooling water channel 44 in order to reduce the temperature of the mold seat.
The third speed reduction mechanism 311 is further provided with a second eccentric element 36. The second eccentric element 36 has two ends respectively forming a first eccentric section 361 and a second eccentric section 362. The first eccentric section 361 and the second eccentric section 362 are arranged on the same axial line. The first eccentric section 361 is coupled to the third speed reduction mechanism 311. The third transmission arm 32 is provided with a second spindle hole 321 formed in an end of thereof The second eccentric section 362 is mounted in the second spindle hole 321.
The third servomotor 31 is coupled to a third frame 37. The third frame 37 is provided with a fourth through aperture 371. The fourth through aperture 371 receives the third speed reduction mechanism 311 to extend therethrough.
With the above structure, when the first servomotor 12 is in operation, the screw 13 is rotated and the transmission unit 14 converts the rotation of the screw 13 into vertical reciprocal movement.
Referring to
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It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.
